1988 Volume 10 Issue 2 Pages 153-159
X-ray-negative early stage lung squamous cell carcinoma was detected in a 73-year-old male by a sputum cytology mass screening. Bronchoscopy revealed a tumor at the orifice of right B^6_a. Right S^6 segmentectomy was performed. Four months later two other squamous cell carcinoma lesions were detected, one at the orifice of left B^3_<b+c> and the other at the bifurcation of left B^<1+2>_<a+b> and B^<1+2>_c. After radiotherapy the lesions disappeared. Four months later, another early bronchogenic carcinoma was detected at the orifice of left B^8 and B^9. Radiotherapy was performed again. Because of the possibility of multicentric tumors, it is important to follow up X-ray negative bronchogenic carcinoma carefully. Especially, at operation, procedures should be as limited as possible. For the inoperable case other therapeutic procedures, e.g. laser treatment and ^<60>Co irradiation, should be performed.